some styling to get chosen looking pretty with bootstrap 3

bootstrap_chosen.less

.chosen-container {
  width: 100% !important;
  font-size: 16px;
  
  .search-choice span {
    font-size: 16px;
    display: inline-block;
    padding: 2.5px;
  }

  .search-choice-close {
    margin-top: 2px;
  }

  .chosen-results li {
    font-size: 16px;
  }

  .chosen-choices {
    position: static !important;
  }
  .search-field input {
    height: 30px !important;
  }
}